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From "patrice (JIRA)" <j...@apache.org>
Subject [jira] Commented: (AMQ-1351) Multiple consumers on a single queue, each with a transacted session, fails; only one consumer sees messages; also message loss after a few of receiveNoWait/rollback
Date Sun, 29 Jul 2007 04:28:50 GMT

    [ https://issues.apache.org/activemq/browse/AMQ-1351?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_39784
] 

patrice commented on AMQ-1351:
------------------------------

I suspect the issue of only consumer seeing messages is due to some message batching by the
broker for each session. If this is the case, what is the parameter ?
Concerning the message evaporating after a number of rollbacks, this may also be configurable,
but where is the message evaporating to ? Is there a default deadletter repository somewhere
?

> Multiple consumers on a single queue, each with a transacted session, fails; only one
consumer sees messages; also message loss after a few of receiveNoWait/rollback
> ---------------------------------------------------------------------------------------------------------------------------------------------------------------------
>
>                 Key: AMQ-1351
>                 URL: https://issues.apache.org/activemq/browse/AMQ-1351
>             Project: ActiveMQ
>          Issue Type: Bug
>          Components: Broker
>    Affects Versions: 4.1.1
>         Environment: windows XP SP2
>            Reporter: patrice
>
> Setup:
> one queue with a one producer and five consumers; each consumer has a transacted session
over a single connection.; each consumer is invoked in turn using consumer.receiveNoWait().
> I have also tried this with a connection per consumer, instead of a single connection.
> Result:
> Only one consumer sees messages on the queue;  after a number of receiveNoWait and rollback
(always for the one consumer that can consume), the message disappears (???) and further calls
to the consumer will now receive the next message in the queue.
> I see many messages concerning failures of multiple consumers on a single queue. If this
is really the case, this makes ActiveMQ useless, which is a grave issue for me since I was
blindly counting on this for a prototype presentation.
> I've looked in your test suite for multiple consumers on separate sessions, but to no
avail. Is there one ?
> Any help will be appreciated.

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